<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<meta name="viewport" content="width=device-width, initial-scale=1.0">
	<title>Document</title>
</head>
<body>
	
</body>
<script>
	//过滤  循环  计算
	let arr =[1,2,3,4,"周杰伦","javascript/json"]

    let arr1=arr.filter((item)=> item=="周杰伦" || item=="javascript/json")
    console.log(arr)
    console.log(arr1)

    let arr2 =arr.map((item)=>item+"1")
    console.log(arr2)

   arr.forEach((item)=>{
    	console.log(item)
    })
   let arr3 =arr.map((item)=> item+"AAA")

   console.log(arr3)
</script>
</html>